eliminating a doppler shift in a rayleigh fading channel

Hi,
I am very new at this topics and I am now studying on an ofdm simulation
with a blind channel estimation.I can do a basic ofdm simulation but in
fact I have a rayleigh fading channel with doppler shift and for making
good blind estimation I must develop some algorithms to eliminate doppler
shifts.Is there anyone that can give me some help?
Thanks for your attention...
                                         Burkay ET�LER
                                         burkaye@hotmail.com   

burkaye wrote:
> I must develop some algorithms to eliminate doppler shifts.

Could you explain more detail about what the meaning of eliminating 
doppler shifts is? To my understating, the amount of doppler shift in 
the channel is a one which is related to the channel estimation but 
there is no way to eliminate it since it is already happened. Regarding 
to the channel estimation, if the amount is large, the period of pilot 
symbol averaging is to be shorter, otherwise it is to be longer. Note 
that the longer period of pilot symbol averaing improves the quality of 
the estimated channel information value, which obviously improves the 
decoding performance of receivers.

To obtain the information related to the amount of dopper shift, we 
usually estimate the channel correlation coefficient, which is give as a 
function of the amount of doppler shift. For example, in Rayleigh fading 
channels, the correlation coefficient is represented as

rho = bessel( tau)

where tau is the amount of doppler shift.

-James Gold